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diff --git a/src/languages/externallanguage.h b/src/languages/externallanguage.h
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+++ b/src/languages/externallanguage.h
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+/***************************************************************************
+ *   Copyright (C) 2005 by David Saxton                                    *
+ *   [email protected]                                                    *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ ***************************************************************************/
+
+#ifndef EXTERNALLANGUAGE_H
+#define EXTERNALLANGUAGE_H
+
+#include "language.h"
+
+class KProcess;
+
+/**
+Base class for Language support that relies on an external program; so this
+class provides functionality for dealing with external processes.
+
+@author Daniel Clarke
+@author David Saxton
+*/
+class ExternalLanguage : public Language
+{
+Q_OBJECT
+public:
+	ExternalLanguage( ProcessChain *processChain, KTechlab *parent, const QString &name );
+	~ExternalLanguage();
+	
+protected slots:
+	void receivedStdout( KProcess *, char * buffer, int buflen );
+	void receivedStderr( KProcess *, char * buffer, int buflen );
+	void processExited( KProcess * );
+	
+protected:
+	/**
+	 * Call this to start the language process. ExternalLanguage will ensure
+	 * that communication et all is properly set up.
+	 * @return true on success, false on error
+	 */
+	bool start();
+	/**
+	 * @returns whether the string outputted to stdout is an error or not
+	 */
+	virtual bool isError( const QString &message ) const = 0;
+	/**
+	 * @returns whether the string outputted to stderr is fatal (stopped compilation)
+	 */
+	virtual bool isStderrOutputFatal( const QString & message ) const { Q_UNUSED(message); return true; }
+	/**
+	 * @returns whether the string outputted to stdout is a warning or not
+	 */
+	virtual bool isWarning( const QString &message ) const = 0;
+	/**
+	 * Called when the process outputs a (non warning/error) message
+	 */
+	virtual void outputtedMessage( const QString &/*message*/ ) {};
+	/**
+	 * Called when the process outputs a warning
+	 */
+	virtual void outputtedWarning( const QString &/*message*/ ) {};
+	/**
+	 * Called when the process outputs an error
+	 */
+	virtual void outputtedError( const QString &/*message*/ ) {};
+	/**
+	 * Called when the process exits (called before any signals are emitted,
+	 * etc). If you reinherit this function, you should return whether 
+	 * everything is OK.
+	 */
+	virtual bool processExited( bool successfully ) { return successfully; }
+	/**
+	 * Call this function if your process could not be started - the process
+	 * will be deleted, and a failure signal emitted.
+	 */
+	void processInitFailed();
+	/**
+	 * Disconnects and deletes the language's process.
+	 */
+	void deleteLanguageProcess();
+	/**
+	 * Creates process and makes connections, ready for the derived class to
+	 * add arguments and start the process.
+	 */
+	void resetLanguageProcess();
+	/**
+	 * Prints out the command used for running the process, with any arguments
+	 * that contain spaces put into quotation marks.
+	 */
+	void displayProcessCommand();
+	
+	KProcess * m_languageProcess;
+};
+
+#endif